Withings ScanWatch Series Installation And Operating Instructions Manual page 58

3. Place your fingers on the bezel (top ring) for 30 seconds. Stay still, don't move
or talk, and relax.
The ECG recording starts after a first vibration. Please remain still during the
measurement process. It is better to be seated or to place your arm on your
leg, and try not to contract your arm and hand muscles. ScanWatch vibrates
twice when the ECG recording is completed.
Important: When recording your ECG, the watch will give you 3 attempts to
take a measurement. If the ECG recording fails on the third attempt, the watch
will vibrate twice. If you wish to attempt a new ECG recording, you will have to
short press the side button on the watch to start again.
4. Tap Done.
ScanWatch
v1.0 | August, 2020
EN - 58